Gold and ore sizing machine.



Patented lan. l5, I90l.

w. GRAY GOLD AND ORE SIZING MACHINE.

(Application filed Feb 23, 1898.)

2 Sheets-Sheet I.

(No Model.)

Patented Ian. l5, I90l.

(Application filed Feb. 23, 1898.)

2 Sheets-Sheet 2.

(N0 Model.)

m N E V m WITNESSES r'rED STATES PATENT OFFICE.

WILLIAM GRAY, OF LINCOLN, NEBRASKA.

GOLD AND ORE SIZING MACHINE.

SPECIFICATION forming part of Letters Patent No. 666,050, dated January 15, 1901.

Application filed February 23, 1898. Serial No. 671,303. (No model.)

To all whom it nuty concern:

Be it known that 1, WILLIAM GRAY, a citizen of the United States, residing at Lincoln, in the county of Lancaster and State of Nebraska, have invented certain new and useful Improvements in Gold and Ore Sizing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a preferably portable gold and ore sizing machine which is designed to be used in connection with an airblast separator; and it consists of certain novel constructions, combinations, and arrangements of parts, as will be hereinafter described and claimed.

In the accompanying drawings, Figure l is a perspective view of my apparatus as it ap pears inclosed in an outer casing and ready for transportation. Fig. 2 is a longitudinal section through the same. Fig. 3 is an end elevation of the machine with one end of the casing removed and the shaft in section. Fig. 4 is an enlarged detail sectional view of the front end of the screens. Fig. 5 is a crosssection of the same. Fig. 6 is a detail view in elevation of a portion of one of the tripping-dogs and the flipper. Fig. 7 is a detail sectional view of a portion of the apparatus, showing the hopper and a portion of the screens. Fig. 8 is a rear View of the back of the hopper. Fig. 9 is a detail view showing the means of securing the flipper to one of the screens. Fig. 10 is a detail sectional view showing the manner of securing the operating-handle; and Fig. 11 is adetail perspective view of one of the spouts, looking at the same from the rear.

The objects of my invention are, first, to produce a simple, portable, and easily-constructed machine which will separate the materials gold, ore, and sandwhich are being treated into dilferent sizes and deposit them into different receptacles, the gold and sand in each respective receptacle being of equal size; second, to provide means for flipping or striking the screens on their upper surfaces or sides as they revolve, so as to dislodge any particles of gold or sand which may have become wedged in the meshes of the screens, and, third, to arrange the screens on an incline and to terminate the lower ends of the screens in rear of one another and provide a novel construction of discharge-spouts which will conduct the sized materials to different receptacles.

To accomplish these ends, my invention consists of certain novel constructions, combinations, and arrangements of parts, as will be described.

In the drawings, A represents a suitable frame, which is approximately rectangular in form, being somewhat larger at bottom than at top,and is provided with legs a, which raise the body portion proper of the casing from ofi the ground and enable the screens of the machine to be given a more or less inclination, as circumstances may require, in treating certain grades of earth by setting the front or rear legs in holes in the ground, though usually the inclination of the screens shown in the drawings will be sufiicientto properly treat the same, it only being in a few instances that it will be found necessary to incline the body of the machine proper. The bottom of the frame is constructed to form a compartment or receptacle 0. for saving the finest, which is usually the richest, materials The front and rear of the casing or frame are provided with suitable doors a hinged to said frame and provided with means for looking the same. The frame is also provided with means a to engage removable handles or bars a for aiding in carrying the machine from place to place. The sides and top of the frame are also preferably covered with canvas a By this construction of the frame or casing the same is rendered portable and the machine can be easily and conveniently carried up and over very uneven and rough ground by parties using the same, thus making it possible to treat earth in localities which have been heretofore abandoned on account of the difficulty of getting to the same.

13,0, D, andE represent cylindrical screens, which are arranged one within the other and which are secured together by means of a centrally-arranged shaft T, which carries hubs F, having radiating arms f. The arms f are threaded throughout their entire length and are screwed into the hubs F, as shown in Fig. 6. The screens are arranged about three secured to the ends of the screens.

or outer ends of the dogs extend up a coninches apart and are secured inpositionlon. the arms of the hubby means of double jamn utsf, one nutbeinglocated inside the screen and the other on the outside thereof. By-thisconstruction the screens are not only held steady at the proper distance apart,- but can be easily adjusted to any desired position.

It being necessary for the most efficient working of the screens that they becl'ean at all times, I provide flippers S, which are so constructed and arranged that the screen? will be automaticallyand'continually struck or jarred on their upper surfaces, thereby more successfully shaking the sand from that part of the under side of the said screens. To accomplish this object, I provide at suitable points on the outer screens a number of dogs- Gsay six-which are pivoted to a band surrounding said screen. To the inner end of the dog is pivoted a rod 9, which latter extends through and to the innermost screen. The said rods 9 are connected to springstrips 9 preferably of wood, which extend from'end to end of said screen, the ends of the strips being set into a socket g and the said socket The free siderable distance above the pivot-point of the said dogs and are designed to be struck by a roller H, secured to the frame'of the machine immediately above' the screens-and'in line with the dogs. By this constructionand arrangement it is obvious that as the screens revolve the outer free end of the dogs-will be struck by the roller and depressed and the rods connected tothe inner'ends of the dogs thereby raised and the spring-strips to which said rods are'connected likewise raised untilthe dogs have passed by the roller, whenthe parts will be released and the flippers'will'be caused to strike all of the screens automatically and simultaneously on theirupper'surface. By the use of cylindrical rotary screens instead of fiat screens having a vibrating movement and arranging the flippers so as to strikethescreens on their upper surfaces I' am enabled to much more readily clean the screens, as all tendency of the sand or gold to simply move back and'forth in the machine without dropping out is overcome, the sand and gold in my construction falling out readily by gravity. The screens, preferably four 7 in number, are arranged concentrically one within the other and about three inches apart; as above stated. These screens, except the outer screen, are constructedof perforated plates, the perforations in all the'scre'ens being of the same length and being elongated and extending parallel with the axis of the screen, and the widths of the perforations in each respective screen arethe same; but the widths of the perforations of thedif ferent screens decrease in size one-half from the inner to the outer screens. The: outside screen is constructed of woven Wire, the mesh the d-iameter of-the mesh of the next succeedingouter screen, as shown'in Fig. .4.

I regard the decrease of the size of the mesh ..of..the. respective screens, as just described, as one of the important features of my invention,as bythis construction the fewest number of screens possible are required and the materials being treated will be found to be sufficiently separated in sizes so that there will be no difficulty in separating the gold or TfiTfrom the sand by the air-blast separator. Itwill also be seen. that bylhis construction .the gold and sand of one diameter will be accurately separated from gold and sand of larger or smaller diameters and deposited into separate receptacles. I It will also be observed that by this-construction particles of wire or elongated gold will assume a position inth'screens at right angles to the movement of the rotation of said screens'and parallel with the elongated mesh, so that such elongated or wire gold will be separated with particles of sand having a diameter not greater than its own, while withoutthe use of the elongated mesh'or openings particles of such elongated or wire gold would be depositedwith particles of sand having a diameter equal to the length of said gold, thereby rendering it moredifficult to'separate the gold from the sand in the blowing action.

I'am aware that it is not new to arrange screens one within the other. It may not be new to provide elongatedopeningsin rotary iscreens' which extend parallel with the-axis gof rotat1on; b'ut I am not aware that it is old gto provide a series'of' rotary-screensarranged one within the other, the smallest diameter iof'the mesh of each screen beingdecreased gscreens'. The rear ends of the'screens'termiinate back of one another, as shown-at J, for

ithe'conveni'ence of the discharge of thema- Eterial being treated and for the attachment jof-a simply-constructed spout or chute K, asiwill behereinafter described. The screens.

This is done to strengthen thescreensat these points. The spouts K above mentioned are made, preferably, of sheetmetal and preferably are formed with a'flatside extending in front of the end of the cylinder, atright angles tothe axis thereof, andwith an oppositeside cut away toconformtothe contour of the screens, said spouts being secured to the frame of the machine by means of bolts it. The construction of oneof the spouts is shown in Fig. 11. The'spoutsare'located at thedis'charge ends of all of the screens, the material passing down through thespouts, except" that discharged through the outer screen, whichis collected into acompartment below the said screen. The spouts are preferably soldered together, so as to form one integral spout having distinct andseparate of which is of a diameter equal to one-half discharge-openings and the Whole secured to IIO the frame of the machine by suitable bolts and nuts L. By this construction and arrangement it will be observed that these spouts are at right angles to the axis of the screens and that by being so they are easily constructed, as all joints Within the said spouts are square or flat, while heretofore it has been necessary to pound out spouts of. difficult shapes at great expense in order to gather the different-sized materials from a sizer constructedof interiorly-arranged screens. I am enabled to use such a construction of discharge-spouts by terminating the ends of the screens in rear of one another. I regard this as another important feature of my invention.

The hopper M is of ordinary construction to deliver the material to be treated into the interior of the inner screen and is provided with a suitable gate or valve m to regulate the feed of the material.

A gear-wheel N is provided on the shaft carrying the screens near the discharge end of the machine. With this gear-wheel meshes a pinion-wheel O, which latter is carried by a short shaft P, to which a crank Q for operating the said machine is attached. The said short shaft P is provided with a bevel portion 19 and a threaded portion 13'. The crank is provided with a corresponding beveled opening q. The beveled opening in the crank is slipped onto the beveled portion of the shaft and by screwing on the nut 19 the crankwill be wedged and held firmly in place.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of a screen-cylinder, means for rotating the same, a series of resilient strips arranged at separated points around the circumference of the screen and extending longitudinally thereof, sockets upon the screen within which the ends of the strips are received, and means for elevating and releasing the strips to cause them to strike the screen successively, substantially as described.

2. The combination of a screen-cylinder, means for rotating the same, two or more resilient strips arranged around the circumference of the screen at separated points, and extending longitudinally thereof, sockets upon the screen for receiving the ends of the strips, dogs pivoted to the screens and connected to the strips, and means for actuating I the dogs in succession to cause the strips to forcibly strike the screen, substantially as described.

In testimony whereof I hereunto afiix my signature in presence of two Witnesses.

7 WILLIAM GRAY. Witnesses:

E. T. FENWIOK, JOHN L. FLETCHER. 

